include/linux/rtnetlink.h

   1 #ifndef __LINUX_RTNETLINK_H
   2 #define __LINUX_RTNETLINK_H
   3
   4 #include <linux/netlink.h>
   5 #include <linux/if_link.h>
   6 #include <linux/if_addr.h>
   7 #include <linux/neighbour.h>
   8
   9 /****
  10  *              Routing/neighbour discovery messages.
  11  ****/
  12
  13 /* Types of messages */
  14
  15 enum {
  16         RTM_BASE        = 16,
  17 #define RTM_BASE        RTM_BASE
  18
  19         RTM_NEWLINK     = 16,
  20 #define RTM_NEWLINK     RTM_NEWLINK
  21         RTM_DELLINK,
  22 #define RTM_DELLINK     RTM_DELLINK
  23         RTM_GETLINK,
  24 #define RTM_GETLINK     RTM_GETLINK
  25         RTM_SETLINK,
  26 #define RTM_SETLINK     RTM_SETLINK
  27
  28         RTM_NEWADDR     = 20,
  29 #define RTM_NEWADDR     RTM_NEWADDR
  30         RTM_DELADDR,
  31 #define RTM_DELADDR     RTM_DELADDR
  32         RTM_GETADDR,
  33 #define RTM_GETADDR     RTM_GETADDR
  34
  35         RTM_NEWROUTE    = 24,
  36 #define RTM_NEWROUTE    RTM_NEWROUTE
  37         RTM_DELROUTE,
  38 #define RTM_DELROUTE    RTM_DELROUTE
  39         RTM_GETROUTE,
  40 #define RTM_GETROUTE    RTM_GETROUTE
  41
  42         RTM_NEWNEIGH    = 28,
  43 #define RTM_NEWNEIGH    RTM_NEWNEIGH
  44         RTM_DELNEIGH,
  45 #define RTM_DELNEIGH    RTM_DELNEIGH
  46         RTM_GETNEIGH,
  47 #define RTM_GETNEIGH    RTM_GETNEIGH
  48
  49         RTM_NEWRULE     = 32,
  50 #define RTM_NEWRULE     RTM_NEWRULE
  51         RTM_DELRULE,
  52 #define RTM_DELRULE     RTM_DELRULE
  53         RTM_GETRULE,
  54 #define RTM_GETRULE     RTM_GETRULE
  55
  56         RTM_NEWQDISC    = 36,
  57 #define RTM_NEWQDISC    RTM_NEWQDISC
  58         RTM_DELQDISC,
  59 #define RTM_DELQDISC    RTM_DELQDISC
  60         RTM_GETQDISC,
  61 #define RTM_GETQDISC    RTM_GETQDISC
  62
  63         RTM_NEWTCLASS   = 40,
  64 #define RTM_NEWTCLASS   RTM_NEWTCLASS
  65         RTM_DELTCLASS,
  66 #define RTM_DELTCLASS   RTM_DELTCLASS
  67         RTM_GETTCLASS,
  68 #define RTM_GETTCLASS   RTM_GETTCLASS
  69
  70         RTM_NEWTFILTER  = 44,
  71 #define RTM_NEWTFILTER  RTM_NEWTFILTER
  72         RTM_DELTFILTER,
  73 #define RTM_DELTFILTER  RTM_DELTFILTER
  74         RTM_GETTFILTER,
  75 #define RTM_GETTFILTER  RTM_GETTFILTER
  76
  77         RTM_NEWACTION   = 48,
  78 #define RTM_NEWACTION   RTM_NEWACTION
  79         RTM_DELACTION,
  80 #define RTM_DELACTION   RTM_DELACTION
  81         RTM_GETACTION,
  82 #define RTM_GETACTION   RTM_GETACTION
  83
  84         RTM_NEWPREFIX   = 52,
  85 #define RTM_NEWPREFIX   RTM_NEWPREFIX
  86
  87         RTM_GETMULTICAST = 58,
  88 #define RTM_GETMULTICAST RTM_GETMULTICAST
  89
  90         RTM_GETANYCAST  = 62,
  91 #define RTM_GETANYCAST  RTM_GETANYCAST
  92
  93         RTM_NEWNEIGHTBL = 64,
  94 #define RTM_NEWNEIGHTBL RTM_NEWNEIGHTBL
  95         RTM_GETNEIGHTBL = 66,
  96 #define RTM_GETNEIGHTBL RTM_GETNEIGHTBL
  97         RTM_SETNEIGHTBL,
  98 #define RTM_SETNEIGHTBL RTM_SETNEIGHTBL
  99
 100         RTM_NEWNDUSEROPT = 68,
 101 #define RTM_NEWNDUSEROPT RTM_NEWNDUSEROPT
 102
 103         RTM_NEWADDRLABEL = 72,
 104 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
 105         RTM_DELADDRLABEL,
 106 #define RTM_NEWADDRLABEL RTM_NEWADDRLABEL
 107         RTM_GETADDRLABEL,
 108 #define RTM_GETADDRLABEL RTM_GETADDRLABEL
 109
 110         __RTM_MAX,
 111 #define RTM_MAX         (((__RTM_MAX + 3) & ~3) - 1)
 112 };
 113
 114 #define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
 115 #define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
 116 #define RTM_FAM(cmd)    (((cmd) - RTM_BASE) >> 2)
 117
 118 /*
 119    Generic structure for encapsulation of optional route information.
 120    It is reminiscent of sockaddr, but with sa_family replaced
 121    with attribute type.
 122  */
 123
 124 struct rtattr
 125 {
 126         unsigned short  rta_len;
 127         unsigned short  rta_type;
 128 };
 129
 130 /* Macros to handle rtattributes */
 131
 132 #define RTA_ALIGNTO     4
 133 #define RTA_ALIGN(len) ( ((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1) )
 134 #define RTA_OK(rta,len) ((len) >= (int)sizeof(struct rtattr) && \
 135                          (rta)->rta_len >= sizeof(struct rtattr) && \
 136                          (rta)->rta_len <= (len))
 137 #define RTA_NEXT(rta,attrlen)   ((attrlen) -= RTA_ALIGN((rta)->rta_len), \
 138                                  (struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
 139 #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
 140 #define RTA_SPACE(len)  RTA_ALIGN(RTA_LENGTH(len))
 141 #define RTA_DATA(rta)   ((void*)(((char*)(rta)) + RTA_LENGTH(0)))
 142 #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
 143
 144
 145
 146
 147 /******************************************************************************
 148  *              Definitions used in routing table administration.
 149  ****/
 150
 151 struct rtmsg
 152 {
 153         unsigned char           rtm_family;
 154         unsigned char           rtm_dst_len;
 155         unsigned char           rtm_src_len;
 156         unsigned char           rtm_tos;
 157
 158         unsigned char           rtm_table;      /* Routing table id */
 159         unsigned char           rtm_protocol;   /* Routing protocol; see below  */
 160         unsigned char           rtm_scope;      /* See below */
 161         unsigned char           rtm_type;       /* See below    */
 162
 163         unsigned                rtm_flags;
 164 };
 165
 166 /* rtm_type */
 167
 168 enum
 169 {
 170         RTN_UNSPEC,
 171         RTN_UNICAST,            /* Gateway or direct route      */
 172         RTN_LOCAL,              /* Accept locally               */
 173         RTN_BROADCAST,          /* Accept locally as broadcast,
 174                                    send as broadcast */
 175         RTN_ANYCAST,            /* Accept locally as broadcast,
 176                                    but send as unicast */
 177         RTN_MULTICAST,          /* Multicast route              */
 178         RTN_BLACKHOLE,          /* Drop                         */
 179         RTN_UNREACHABLE,        /* Destination is unreachable   */
 180         RTN_PROHIBIT,           /* Administratively prohibited  */
 181         RTN_THROW,              /* Not in this table            */
 182         RTN_NAT,                /* Translate this address       */
 183         RTN_XRESOLVE,           /* Use external resolver        */
 184         __RTN_MAX
 185 };
 186
 187 #define RTN_MAX (__RTN_MAX - 1)
 188
 189
 190 /* rtm_protocol */
 191
 192 #define RTPROT_UNSPEC   0
 193 #define RTPROT_REDIRECT 1       /* Route installed by ICMP redirects;
 194                                    not used by current IPv4 */
 195 #define RTPROT_KERNEL   2       /* Route installed by kernel            */
 196 #define RTPROT_BOOT     3       /* Route installed during boot          */
 197 #define RTPROT_STATIC   4       /* Route installed by administrator     */
 198
 199 /* Values of protocol >= RTPROT_STATIC are not interpreted by kernel;
 200    they are just passed from user and back as is.
 201    It will be used by hypothetical multiple routing daemons.
 202    Note that protocol values should be standardized in order to
 203    avoid conflicts.
 204  */
 205
 206 #define RTPROT_GATED    8       /* Apparently, GateD */
 207 #define RTPROT_RA       9       /* RDISC/ND router advertisements */
 208 #define RTPROT_MRT      10      /* Merit MRT */
 209 #define RTPROT_ZEBRA    11      /* Zebra */
 210 #define RTPROT_BIRD     12      /* BIRD */
 211 #define RTPROT_DNROUTED 13      /* DECnet routing daemon */
 212 #define RTPROT_XORP     14      /* XORP */
 213 #define RTPROT_NTK      15      /* Netsukuku */
 214
 215 /* rtm_scope
 216
 217    Really it is not scope, but sort of distance to the destination.
 218    NOWHERE are reserved for not existing destinations, HOST is our
 219    local addresses, LINK are destinations, located on directly attached
 220    link and UNIVERSE is everywhere in the Universe.
 221
 222    Intermediate values are also possible f.e. interior routes
 223    could be assigned a value between UNIVERSE and LINK.
 224 */
 225
 226 enum rt_scope_t
 227 {
 228         RT_SCOPE_UNIVERSE=0,
 229 /* User defined values  */
 230         RT_SCOPE_SITE=200,
 231         RT_SCOPE_LINK=253,
 232         RT_SCOPE_HOST=254,
 233         RT_SCOPE_NOWHERE=255
 234 };
 235
 236 /* rtm_flags */
 237
 238 #define RTM_F_NOTIFY            0x100   /* Notify user of route change  */
 239 #define RTM_F_CLONED            0x200   /* This route is cloned         */
 240 #define RTM_F_EQUALIZE          0x400   /* Multipath equalizer: NI      */
 241 #define RTM_F_PREFIX            0x800   /* Prefix addresses             */
 242
 243 /* Reserved table identifiers */
 244
 245 enum rt_class_t
 246 {
 247         RT_TABLE_UNSPEC=0,
 248 /* User defined values */
 249         RT_TABLE_COMPAT=252,
 250         RT_TABLE_DEFAULT=253,
 251         RT_TABLE_MAIN=254,
 252         RT_TABLE_LOCAL=255,
 253         RT_TABLE_MAX=0xFFFFFFFF
 254 };
 255
 256
 257 /* Routing message attributes */
 258
 259 enum rtattr_type_t
 260 {
 261         RTA_UNSPEC,
 262         RTA_DST,
 263         RTA_SRC,
 264         RTA_IIF,
 265         RTA_OIF,
 266         RTA_GATEWAY,
 267         RTA_PRIORITY,
 268         RTA_PREFSRC,
 269         RTA_METRICS,
 270         RTA_MULTIPATH,
 271         RTA_PROTOINFO, /* no longer used */
 272         RTA_FLOW,
 273         RTA_CACHEINFO,
 274         RTA_SESSION, /* no longer used */
 275         RTA_MP_ALGO, /* no longer used */
 276         RTA_TABLE,
 277         __RTA_MAX
 278 };
 279
 280 #define RTA_MAX (__RTA_MAX - 1)
 281
 282 #define RTM_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct rtmsg))))
 283 #define RTM_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct rtmsg))
 284
 285 /* RTM_MULTIPATH --- array of struct rtnexthop.
 286  *
 287  * "struct rtnexthop" describes all necessary nexthop information,
 288  * i.e. parameters of path to a destination via this nexthop.
 289  *
 290  * At the moment it is impossible to set different prefsrc, mtu, window
 291  * and rtt for different paths from multipath.
 292  */
 293
 294 struct rtnexthop
 295 {
 296         unsigned short          rtnh_len;
 297         unsigned char           rtnh_flags;
 298         unsigned char           rtnh_hops;
 299         int                     rtnh_ifindex;
 300 };
 301
 302 /* rtnh_flags */
 303
 304 #define RTNH_F_DEAD             1       /* Nexthop is dead (used by multipath)  */
 305 #define RTNH_F_PERVASIVE        2       /* Do recursive gateway lookup  */
 306 #define RTNH_F_ONLINK           4       /* Gateway is forced on link    */
 307
 308 /* Macros to handle hexthops */
 309
 310 #define RTNH_ALIGNTO    4
 311 #define RTNH_ALIGN(len) ( ((len)+RTNH_ALIGNTO-1) & ~(RTNH_ALIGNTO-1) )
 312 #define RTNH_OK(rtnh,len) ((rtnh)->rtnh_len >= sizeof(struct rtnexthop) && \
 313                            ((int)(rtnh)->rtnh_len) <= (len))
 314 #define RTNH_NEXT(rtnh) ((struct rtnexthop*)(((char*)(rtnh)) + RTNH_ALIGN((rtnh)->rtnh_len)))
 315 #define RTNH_LENGTH(len) (RTNH_ALIGN(sizeof(struct rtnexthop)) + (len))
 316 #define RTNH_SPACE(len) RTNH_ALIGN(RTNH_LENGTH(len))
 317 #define RTNH_DATA(rtnh)   ((struct rtattr*)(((char*)(rtnh)) + RTNH_LENGTH(0)))
 318
 319 /* RTM_CACHEINFO */
 320
 321 struct rta_cacheinfo
 322 {
 323         __u32   rta_clntref;
 324         __u32   rta_lastuse;
 325         __s32   rta_expires;
 326         __u32   rta_error;
 327         __u32   rta_used;
 328
 329 #define RTNETLINK_HAVE_PEERINFO 1
 330         __u32   rta_id;
 331         __u32   rta_ts;
 332         __u32   rta_tsage;
 333 };
 334
 335 /* RTM_METRICS --- array of struct rtattr with types of RTAX_* */
 336
 337 enum
 338 {
 339         RTAX_UNSPEC,
 340 #define RTAX_UNSPEC RTAX_UNSPEC
 341         RTAX_LOCK,
 342 #define RTAX_LOCK RTAX_LOCK
 343         RTAX_MTU,
 344 #define RTAX_MTU RTAX_MTU
 345         RTAX_WINDOW,
 346 #define RTAX_WINDOW RTAX_WINDOW
 347         RTAX_RTT,
 348 #define RTAX_RTT RTAX_RTT
 349         RTAX_RTTVAR,
 350 #define RTAX_RTTVAR RTAX_RTTVAR
 351         RTAX_SSTHRESH,
 352 #define RTAX_SSTHRESH RTAX_SSTHRESH
 353         RTAX_CWND,
 354 #define RTAX_CWND RTAX_CWND
 355         RTAX_ADVMSS,
 356 #define RTAX_ADVMSS RTAX_ADVMSS
 357         RTAX_REORDERING,
 358 #define RTAX_REORDERING RTAX_REORDERING
 359         RTAX_HOPLIMIT,
 360 #define RTAX_HOPLIMIT RTAX_HOPLIMIT
 361         RTAX_INITCWND,
 362 #define RTAX_INITCWND RTAX_INITCWND
 363         RTAX_FEATURES,
 364 #define RTAX_FEATURES RTAX_FEATURES
 365         RTAX_RTO_MIN,
 366 #define RTAX_RTO_MIN RTAX_RTO_MIN
 367         __RTAX_MAX
 368 };
 369
 370 #define RTAX_MAX (__RTAX_MAX - 1)
 371
 372 #define RTAX_FEATURE_ECN        0x00000001
 373 #define RTAX_FEATURE_SACK       0x00000002
 374 #define RTAX_FEATURE_TIMESTAMP  0x00000004
 375 #define RTAX_FEATURE_ALLFRAG    0x00000008
 376
 377 struct rta_session
 378 {
 379         __u8    proto;
 380         __u8    pad1;
 381         __u16   pad2;
 382
 383         union {
 384                 struct {
 385                         __u16   sport;
 386                         __u16   dport;
 387                 } ports;
 388
 389                 struct {
 390                         __u8    type;
 391                         __u8    code;
 392                         __u16   ident;
 393                 } icmpt;
 394
 395                 __u32           spi;
 396         } u;
 397 };
 398
 399 /****
 400  *              General form of address family dependent message.
 401  ****/
 402
 403 struct rtgenmsg
 404 {
 405         unsigned char           rtgen_family;
 406 };
 407
 408 /*****************************************************************
 409  *              Link layer specific messages.
 410  ****/
 411
 412 /* struct ifinfomsg
 413  * passes link level specific information, not dependent
 414  * on network protocol.
 415  */
 416
 417 struct ifinfomsg
 418 {
 419         unsigned char   ifi_family;
 420         unsigned char   __ifi_pad;
 421         unsigned short  ifi_type;               /* ARPHRD_* */
 422         int             ifi_index;              /* Link index   */
 423         unsigned        ifi_flags;              /* IFF_* flags  */
 424         unsigned        ifi_change;             /* IFF_* change mask */
 425 };
 426
 427 /********************************************************************
 428  *              prefix information
 429  ****/
 430
 431 struct prefixmsg
 432 {
 433         unsigned char   prefix_family;
 434         unsigned char   prefix_pad1;
 435         unsigned short  prefix_pad2;
 436         int             prefix_ifindex;
 437         unsigned char   prefix_type;
 438         unsigned char   prefix_len;
 439         unsigned char   prefix_flags;
 440         unsigned char   prefix_pad3;
 441 };
 442
 443 enum
 444 {
 445         PREFIX_UNSPEC,
 446         PREFIX_ADDRESS,
 447         PREFIX_CACHEINFO,
 448         __PREFIX_MAX
 449 };
 450
 451 #define PREFIX_MAX      (__PREFIX_MAX - 1)
 452
 453 struct prefix_cacheinfo
 454 {
 455         __u32   preferred_time;
 456         __u32   valid_time;
 457 };
 458
 459
 460 /*****************************************************************
 461  *              Traffic control messages.
 462  ****/
 463
 464 struct tcmsg
 465 {
 466         unsigned char   tcm_family;
 467         unsigned char   tcm__pad1;
 468         unsigned short  tcm__pad2;
 469         int             tcm_ifindex;
 470         __u32           tcm_handle;
 471         __u32           tcm_parent;
 472         __u32           tcm_info;
 473 };
 474
 475 enum
 476 {
 477         TCA_UNSPEC,
 478         TCA_KIND,
 479         TCA_OPTIONS,
 480         TCA_STATS,
 481         TCA_XSTATS,
 482         TCA_RATE,
 483         TCA_FCNT,
 484         TCA_STATS2,
 485         TCA_STAB,
 486         __TCA_MAX
 487 };
 488
 489 #define TCA_MAX (__TCA_MAX - 1)
 490
 491 #define TCA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcmsg))))
 492 #define TCA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcmsg))
 493
 494 /********************************************************************
 495  *              Neighbor Discovery userland options
 496  ****/
 497
 498 struct nduseroptmsg
 499 {
 500         unsigned char   nduseropt_family;
 501         unsigned char   nduseropt_pad1;
 502         unsigned short  nduseropt_opts_len;     /* Total length of options */
 503         int             nduseropt_ifindex;
 504         __u8            nduseropt_icmp_type;
 505         __u8            nduseropt_icmp_code;
 506         unsigned short  nduseropt_pad2;
 507         unsigned int    nduseropt_pad3;
 508         /* Followed by one or more ND options */
 509 };
 510
 511 enum
 512 {
 513         NDUSEROPT_UNSPEC,
 514         NDUSEROPT_SRCADDR,
 515         __NDUSEROPT_MAX
 516 };
 517
 518 #define NDUSEROPT_MAX   (__NDUSEROPT_MAX - 1)
 519
 520 #ifndef __KERNEL__
 521 /* RTnetlink multicast groups - backwards compatibility for userspace */
 522 #define RTMGRP_LINK             1
 523 #define RTMGRP_NOTIFY           2
 524 #define RTMGRP_NEIGH            4
 525 #define RTMGRP_TC               8
 526
 527 #define RTMGRP_IPV4_IFADDR      0x10
 528 #define RTMGRP_IPV4_MROUTE      0x20
 529 #define RTMGRP_IPV4_ROUTE       0x40
 530 #define RTMGRP_IPV4_RULE        0x80
 531
 532 #define RTMGRP_IPV6_IFADDR      0x100
 533 #define RTMGRP_IPV6_MROUTE      0x200
 534 #define RTMGRP_IPV6_ROUTE       0x400
 535 #define RTMGRP_IPV6_IFINFO      0x800
 536
 537 #define RTMGRP_DECnet_IFADDR    0x1000
 538 #define RTMGRP_DECnet_ROUTE     0x4000
 539
 540 #define RTMGRP_IPV6_PREFIX      0x20000
 541 #endif
 542
 543 /* RTnetlink multicast groups */
 544 enum rtnetlink_groups {
 545         RTNLGRP_NONE,
 546 #define RTNLGRP_NONE            RTNLGRP_NONE
 547         RTNLGRP_LINK,
 548 #define RTNLGRP_LINK            RTNLGRP_LINK
 549         RTNLGRP_NOTIFY,
 550 #define RTNLGRP_NOTIFY          RTNLGRP_NOTIFY
 551         RTNLGRP_NEIGH,
 552 #define RTNLGRP_NEIGH           RTNLGRP_NEIGH
 553         RTNLGRP_TC,
 554 #define RTNLGRP_TC              RTNLGRP_TC
 555         RTNLGRP_IPV4_IFADDR,
 556 #define RTNLGRP_IPV4_IFADDR     RTNLGRP_IPV4_IFADDR
 557         RTNLGRP_IPV4_MROUTE,
 558 #define RTNLGRP_IPV4_MROUTE     RTNLGRP_IPV4_MROUTE
 559         RTNLGRP_IPV4_ROUTE,
 560 #define RTNLGRP_IPV4_ROUTE      RTNLGRP_IPV4_ROUTE
 561         RTNLGRP_IPV4_RULE,
 562 #define RTNLGRP_IPV4_RULE       RTNLGRP_IPV4_RULE
 563         RTNLGRP_IPV6_IFADDR,
 564 #define RTNLGRP_IPV6_IFADDR     RTNLGRP_IPV6_IFADDR
 565         RTNLGRP_IPV6_MROUTE,
 566 #define RTNLGRP_IPV6_MROUTE     RTNLGRP_IPV6_MROUTE
 567         RTNLGRP_IPV6_ROUTE,
 568 #define RTNLGRP_IPV6_ROUTE      RTNLGRP_IPV6_ROUTE
 569         RTNLGRP_IPV6_IFINFO,
 570 #define RTNLGRP_IPV6_IFINFO     RTNLGRP_IPV6_IFINFO
 571         RTNLGRP_DECnet_IFADDR,
 572 #define RTNLGRP_DECnet_IFADDR   RTNLGRP_DECnet_IFADDR
 573         RTNLGRP_NOP2,
 574         RTNLGRP_DECnet_ROUTE,
 575 #define RTNLGRP_DECnet_ROUTE    RTNLGRP_DECnet_ROUTE
 576         RTNLGRP_DECnet_RULE,
 577 #define RTNLGRP_DECnet_RULE     RTNLGRP_DECnet_RULE
 578         RTNLGRP_NOP4,
 579         RTNLGRP_IPV6_PREFIX,
 580 #define RTNLGRP_IPV6_PREFIX     RTNLGRP_IPV6_PREFIX
 581         RTNLGRP_IPV6_RULE,
 582 #define RTNLGRP_IPV6_RULE       RTNLGRP_IPV6_RULE
 583         RTNLGRP_ND_USEROPT,
 584 #define RTNLGRP_ND_USEROPT      RTNLGRP_ND_USEROPT
 585         __RTNLGRP_MAX
 586 };
 587 #define RTNLGRP_MAX     (__RTNLGRP_MAX - 1)
 588
 589 /* TC action piece */
 590 struct tcamsg
 591 {
 592         unsigned char   tca_family;
 593         unsigned char   tca__pad1;
 594         unsigned short  tca__pad2;
 595 };
 596 #define TA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct tcamsg))))
 597 #define TA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct tcamsg))
 598 #define TCA_ACT_TAB 1 /* attr type must be >=1 */
 599 #define TCAA_MAX 1
 600
 601 /* End of information exported to user level */
 602
 603 #ifdef __KERNEL__
 604
 605 #include <linux/mutex.h>
 606
 607 static __inline__ int rtattr_strcmp(const struct rtattr *rta, const char *str)
 608 {
 609         int len = strlen(str) + 1;
 610         return len > rta->rta_len || memcmp(RTA_DATA(rta), str, len);
 611 }
 612
 613 extern int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, u32 group, int echo);
 614 extern int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid);
 615 extern int rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group,
 616                        struct nlmsghdr *nlh, gfp_t flags);
 617 extern void rtnl_set_sk_err(struct net *net, u32 group, int error);
 618 extern int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics);
 619 extern int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst,
 620                               u32 id, u32 ts, u32 tsage, long expires,
 621                               u32 error);
 622
 623 extern void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data);
 624
 625 #define RTA_PUT(skb, attrtype, attrlen, data) \
 626 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 627                  goto rtattr_failure; \
 628         __rta_fill(skb, attrtype, attrlen, data); })
 629
 630 #define RTA_APPEND(skb, attrlen, data) \
 631 ({      if (unlikely(skb_tailroom(skb) < (int)(attrlen))) \
 632                 goto rtattr_failure; \
 633         memcpy(skb_put(skb, attrlen), data, attrlen); })
 634
 635 #define RTA_PUT_NOHDR(skb, attrlen, data) \
 636 ({      RTA_APPEND(skb, RTA_ALIGN(attrlen), data); \
 637         memset(skb_tail_pointer(skb) - (RTA_ALIGN(attrlen) - attrlen), 0, \
 638                RTA_ALIGN(attrlen) - attrlen); })
 639
 640 #define RTA_PUT_U8(skb, attrtype, value) \
 641 ({      u8 _tmp = (value); \
 642         RTA_PUT(skb, attrtype, sizeof(u8), &_tmp); })
 643
 644 #define RTA_PUT_U16(skb, attrtype, value) \
 645 ({      u16 _tmp = (value); \
 646         RTA_PUT(skb, attrtype, sizeof(u16), &_tmp); })
 647
 648 #define RTA_PUT_U32(skb, attrtype, value) \
 649 ({      u32 _tmp = (value); \
 650         RTA_PUT(skb, attrtype, sizeof(u32), &_tmp); })
 651
 652 #define RTA_PUT_U64(skb, attrtype, value) \
 653 ({      u64 _tmp = (value); \
 654         RTA_PUT(skb, attrtype, sizeof(u64), &_tmp); })
 655
 656 #define RTA_PUT_SECS(skb, attrtype, value) \
 657         RTA_PUT_U64(skb, attrtype, (value) / HZ)
 658
 659 #define RTA_PUT_MSECS(skb, attrtype, value) \
 660         RTA_PUT_U64(skb, attrtype, jiffies_to_msecs(value))
 661
 662 #define RTA_PUT_STRING(skb, attrtype, value) \
 663         RTA_PUT(skb, attrtype, strlen(value) + 1, value)
 664
 665 #define RTA_PUT_FLAG(skb, attrtype) \
 666         RTA_PUT(skb, attrtype, 0, NULL);
 667
 668 #define RTA_NEST(skb, type) \
 669 ({      struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
 670         RTA_PUT(skb, type, 0, NULL); \
 671         __start;  })
 672
 673 #define RTA_NEST_END(skb, start) \
 674 ({      (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
 675         (skb)->len; })
 676
 677 #define RTA_NEST_COMPAT(skb, type, attrlen, data) \
 678 ({      struct rtattr *__start = (struct rtattr *)skb_tail_pointer(skb); \
 679         RTA_PUT(skb, type, attrlen, data); \
 680         RTA_NEST(skb, type); \
 681         __start; })
 682
 683 #define RTA_NEST_COMPAT_END(skb, start) \
 684 ({      struct rtattr *__nest = (void *)(start) + NLMSG_ALIGN((start)->rta_len); \
 685         (start)->rta_len = skb_tail_pointer(skb) - (unsigned char *)(start); \
 686         RTA_NEST_END(skb, __nest); \
 687         (skb)->len; })
 688
 689 #define RTA_NEST_CANCEL(skb, start) \
 690 ({      if (start) \
 691                 skb_trim(skb, (unsigned char *) (start) - (skb)->data); \
 692         -1; })
 693
 694 #define RTA_GET_U8(rta) \
 695 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u8)) \
 696                 goto rtattr_failure; \
 697         *(u8 *) RTA_DATA(rta); })
 698
 699 #define RTA_GET_U16(rta) \
 700 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u16)) \
 701                 goto rtattr_failure; \
 702         *(u16 *) RTA_DATA(rta); })
 703
 704 #define RTA_GET_U32(rta) \
 705 ({      if (!rta || RTA_PAYLOAD(rta) < sizeof(u32)) \
 706                 goto rtattr_failure; \
 707         *(u32 *) RTA_DATA(rta); })
 708
 709 #define RTA_GET_U64(rta) \
 710 ({      u64 _tmp; \
 711         if (!rta || RTA_PAYLOAD(rta) < sizeof(u64)) \
 712                 goto rtattr_failure; \
 713         memcpy(&_tmp, RTA_DATA(rta), sizeof(_tmp)); \
 714         _tmp; })
 715
 716 #define RTA_GET_FLAG(rta) (!!(rta))
 717
 718 #define RTA_GET_SECS(rta) ((unsigned long) RTA_GET_U64(rta) * HZ)
 719 #define RTA_GET_MSECS(rta) (msecs_to_jiffies((unsigned long) RTA_GET_U64(rta)))
 720
 721 static inline struct rtattr *
 722 __rta_reserve(struct sk_buff *skb, int attrtype, int attrlen)
 723 {
 724         struct rtattr *rta;
 725         int size = RTA_LENGTH(attrlen);
 726
 727         rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
 728         rta->rta_type = attrtype;
 729         rta->rta_len = size;
 730         memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size);
 731         return rta;
 732 }
 733
 734 #define __RTA_PUT(skb, attrtype, attrlen) \
 735 ({      if (unlikely(skb_tailroom(skb) < (int)RTA_SPACE(attrlen))) \
 736                 goto rtattr_failure; \
 737         __rta_reserve(skb, attrtype, attrlen); })
 738
 739 extern void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change);
 740
 741 /* RTNL is used as a global lock for all changes to network configuration  */
 742 extern void rtnl_lock(void);
 743 extern void rtnl_unlock(void);
 744 extern int rtnl_trylock(void);
 745 extern int rtnl_is_locked(void);
 746
 747 extern void rtnetlink_init(void);
 748 extern void __rtnl_unlock(void);
 749
 750 #define ASSERT_RTNL() do { \
 751         if (unlikely(!rtnl_is_locked())) { \
 752                 printk(KERN_ERR "RTNL: assertion failed at %s (%d)\n", \
 753                        __FILE__,  __LINE__); \
 754                 dump_stack(); \
 755         } \
 756 } while(0)
 757
 758 static inline u32 rtm_get_table(struct rtattr **rta, u8 table)
 759 {
 760         return RTA_GET_U32(rta[RTA_TABLE-1]);
 761 rtattr_failure:
 762         return table;
 763 }
 764
 765 #endif /* __KERNEL__ */
 766
 767
 768 #endif  /* __LINUX_RTNETLINK_H */